slot

A fishing size limit where the angler may keep fish shorter than a minimum length but longer than an upper length limit. For instance, a slot limit of 13 to 16 inches means you must, by regulation practice catch-and-release on the fish in the slot. Slot limits are special regulations used on specific bodies of water.

In a distributed-queue dual-bus (DQDB) network, a protocol data unit (PDU) that (a) consists of 53 octets used to transfer segments of user information, (b) has the capacity to contain a segment of 52 octets and a 1-octet access control field, and (c) may be either a pre-arbitrated (PA) slot or a queued arbitrated (QA) slot.